Motor structure

Abstract

The present invention relates to a motor structure, which includes a base having a shaft tube centrally, in which a bottom portion of the shaft tube is sealed for placing a bearing therein, and at least a reference plane is provided on the outer periphery of the shaft tube; a rotor having a spindle disposed centrally therein for passing through the bearing and rotating therein; a stator module disposed on the outer periphery and positioned on the reference plane. Besides, an urging part is disposed on an inner periphery of the top insulation sleeve of the stator module to urge against the bearing so that the precise assembling position of the stator module can be definitely defined to prevent the bearing from getting loose due to high assembling position and to prevent the fracture of the urging part due to low assembling position.

1 . A motor structure, comprising:
 a base having a shaft tube centrally, wherein a bottom portion of the shaft tube is sealed for placing a bearing therein, and at least a reference plane is provided on an outer periphery of the shaft tube;   a rotor having a spindle centrally to pass through a bore of the bearing and to rotate therein; and   a stator module disposed on the outer periphery of the shaft tube and positioned on the reference plane, formed by sandwiching a plurality of silicon steel plates with a top insulation sleeve and a bottom insulation sleeve, and winding with a metal winding, and fixed around the outer periphery by a tight fit, wherein the top insulation sleeve is used to receive the shaft tube, and an urging part is disposed on an inner periphery of the top insulation sleeve to urge against the bearing so as to prevent the bearing from getting loose.   
   
   
       2 . The motor structure as set forth in  claim 1 , wherein the reference plane is arranged at a place having a step mismatch on the periphery of the shaft tube so that an upper half portion of the shaft tube has a smaller outer diameter and an lower half portion thereof has a larger outer diameter. 
   
   
       3 . The motor structure as set forth in  claim 1 , wherein the reference plane is provided by an urging part protruded from the outer periphery of the shaft tube. 
   
   
       4 . The motor structure as set forth in  claim 3 , wherein the urging part is a plurality of protruded blocks. 
   
   
       5 . The motor structure as set forth in  claim 3 , wherein the urging part is a protruded ring. 
   
   
       6 . The motor structure as set forth in  claim 1 , wherein an annular wall is extended upwardly from a top edge of an inner periphery of the top insulation sleeve. 
   
   
       7 . The motor structure as set forth in  claim 1 , wherein the urging part is designed to be a plurality of urging pieces. 
   
   
       8 . The motor structure as set forth in  claim 1 , wherein the urging part is a protruded ring. 
   
   
       9 . The motor structure as set forth in  claim 1 , wherein an axial positional flange is disposed on the outer periphery of the shaft tube. 
   
   
       10 . A motor structure, comprising:
 a base having a shaft tube centrally, wherein a bottom portion of the shaft tube is sealed for placing a bearing therein, and at least a reference plane is provided on an outer periphery of the shaft tube;   a rotor having a spindle centrally to pass through a bore of the bearing and to rotate therein; and   a stator module disposed on the outer periphery of the shaft tube and positioned on the reference plane, formed by sandwiching a plurality of silicon steel plates with a top insulation sleeve and a bottom insulation sleeve, and stuck on the outer periphery of the shaft tube, wherein the top insulation sleeve is used to receive the shaft tube, and an urging part is disposed on an inner periphery of the top insulation sleeve to urge against the bearing so as to prevent the bearing from getting loose.   
   
   
       11 . The motor structure as set forth in  claim 10 , wherein the reference plane is arranged at a place having a step mismatch on the periphery of the shaft tube so that an upper half portion of the shaft tube has a smaller outer diameter and an lower half portion thereof has a larger outer diameter. 
   
   
       12 . The motor structure as set forth in  claim 10 , wherein the reference plane is provided by an urging part protruded from the outer periphery of the shaft tube. 
   
   
       13 . The motor structure as set forth in  claim 12 , wherein the urging part is a plurality of protruded blocks. 
   
   
       14 . The motor structure as set forth in  claim 12 , wherein the urging part is a protruded ring. 
   
   
       15 . The motor structure as set forth in  claim 10 , wherein an annular wall is extended upwardly from a top edge of an inner periphery of the top insulation sleeve. 
   
   
       16 . The motor structure as set forth in  claim 10 , wherein the urging part is designed to be a plurality of urging pieces. 
   
   
       17 . The motor structure as set forth in  claim 10 , wherein the urging part is a protruded ring. 
   
   
       18 . The motor structure as set forth in  claim 10 , wherein an axial positional flange is disposed on the outer periphery of the shaft tube.